ocr: # Grammar Reference 3 - X Index Config About GR Abbreviations Adjectives/Adverbs Apostrophes Brackets Capitals Clauses Colons Commas Conjunctions Dashes Dividing Words Ellipsis Dots Exclamation Hyphens Italics Numbers Parentheses Periods Plurals Preposit 4 Apostrophes -OX Apostrophes are used to form the possessive singular 01- Question Marks Quote noun. The rocket's noise The ghost's moan Verbs Words Coi Apostrophes are used to form the possessive plural of a regular noun. The birds' droppings. The ants' tunnels Irregular nouns with plurals not ending in S, use apostrophes: The Men's Room